Breast pump



FIG. 1 is a front, right perspective view of a breast pump showing my new design;

FIG. 2 is a front elevational view design;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a left side elevational view, the right side being a mirror image thereof;

FIG. 5 is a top plan view thereof;

FIG. 6 is a bottom plan view thereof; and,

FIG. 7 is a cross sectional view thereof along line 7--7 of FIG. 2. 

The ornamental design for a breast pump, as shown and described. 